CN112018785A - Receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation - Google Patents
Receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation Download PDFInfo
- Publication number
- CN112018785A CN112018785A CN202010911479.XA CN202010911479A CN112018785A CN 112018785 A CN112018785 A CN 112018785A CN 202010911479 A CN202010911479 A CN 202010911479A CN 112018785 A CN112018785 A CN 112018785A
- Authority
- CN
- China
- Prior art keywords
- energy storage
- fes
- flywheel energy
- unit
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/30—Arrangements for balancing of the load in a network by storage of energy using dynamo-electric machines coupled to flywheels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
The invention provides a receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation, belongs to the technical field of receiving-end power grid energy storage frequency modulation control, and judges the residual electric quantity SOC of a flywheel energy storage deviceFESWhen the rated capacity H is less than 100 percent, the rated capacity H of the flywheel energy storage device is combinedFES‑NCalculating the charging capacity H of the flywheel energy storage device in real timeFES‑C(ii) a According to the frequency fluctuation of a receiving-end power grid, the real-time computer unit needs to change the integral electric quantity HPFC(ii) a According to the frequency disturbance condition of the receiving-end power grid and the required charging capacity HFES‑CAnd the integral electric quantity H needs to be changedPFCAnd performing flywheel energy storage frequency modulation control. According to the invention, different frequency modulation control modes are adopted for the flywheel energy storage device and the unit according to different power grid frequency disturbances, so that the action times of the unit at high frequency are reduced, the service lives of equipment such as a unit valve and the like are prolonged, and the flywheel energy storage device can realize quick one-time operationAnd frequency modulation is carried out, so that the economic operation of the flywheel energy storage and unit comprehensive frequency modulation system is ensured, and the stable operation of the flywheel energy storage and unit comprehensive frequency modulation system is realized.
Description
Technical Field
The invention relates to the technical field of receiving-end power grid energy storage frequency modulation control, in particular to a receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation.
Background
Frequency is one of the most important quality indicators in the power grid. For the power grid, the frequency is stabilized by dynamic balance of the electric load and the generated power. The change of the system frequency directly reflects the balance condition of the power supply and demand. The power generation is larger than the load consumption, the system frequency is increased, the load consumption is larger than the power generation, and the system frequency is reduced. The power system must be operated within an allowable range around 50Hz, namely, the power system stably operates on the premise of real-time balance of power generation and power utilization, otherwise, the quality of the power of the system is reduced, and in extreme cases, the system is unstable. With the increase of a large number of new energy generator sets connected to a power grid and having impact loads, in order to ensure safe and economic operation of the power grid and improve the power utilization quality of users, the frequency modulation requirement of the power grid on the generator sets is higher and higher. At present, in each large regional power grid in China, large hydroelectric and thermal power units are main frequency modulation power supplies, and the frequency change of a system is responded by continuously adjusting the output of the frequency modulation power supplies, but each of the large hydroelectric and thermal power units has certain limitations and defects and influences the safety and quality of the power grid frequency. The problem of insufficient capacity of the existing frequency modulation is obvious, and a new frequency modulation means is urgently needed.
Under the condition of an extra-high voltage transmission line fault, the power supply in a receiving end power grid needs to be rapidly boosted to make up for frequency drop caused by a power notch. For the grid, Primary Frequency Control (PFC) is the key to grid Frequency Control. Taking a conventional thermal power generating unit as an example, relevant standards such as GB/T31464 grid operation criterion, GB/T30370 Primary frequency modulation test and Performance acceptance guide rule of the thermal power generating unit and the like stipulate that a unit participating primary frequency modulation dead zone is within the range of +/-0.033 Hz. For the power grid frequency disturbance, after the effective disturbance condition is met and the frequency exceeds 50.0 +/-0.05 Hz and lasts for 1s or more, the current disturbance is defined as large disturbance, and the maximum continuous evaluation time of the large disturbance is 60 s. Effective disturbance which does not reach the large disturbance standard is defined as small disturbance, and the maximum continuous evaluation time of the small disturbance is 30 s.
The battery energy storage system has the characteristics of quick response and accurate tracking, so that the battery energy storage system is more efficient than the traditional frequency modulation means. In recent years, large-scale energy storage systems have been receiving attention in the industry to replace power plants for frequency modulation. Compared with the traditional power supply, the energy storage has obvious technical advantages of providing frequency modulation for the power grid, and the economy is gradually presented, so that the operating efficiency of the power system can be effectively improved. Flywheel Energy Storage (FES) is an advanced physical Energy Storage technology, and refers to an Energy Storage mode in which a Flywheel is driven by electric Energy to rotate at a high speed, the electric Energy is converted into mechanical Energy, and when needed, a motor is dragged by inertia of the Flywheel to generate electricity, so that the stored mechanical Energy is converted into electric Energy to be output (so-called Flywheel discharge). The power amplifier has the characteristics of high power density, high response speed, long service life, no maintenance, good expandability, no pollution and the like. Compared with other types of energy storage modes, such as lithium batteries, lead-acid batteries, pumped storage and the like, the flywheel energy storage power station has the advantages of high output power, high instantaneous response speed, low long-term operation and maintenance cost, safety, reliability, environmental friendliness, no pollution and the like. Particularly, the discharge power response speed of the flywheel energy storage system is high, the millisecond level is achieved, the requirement of primary frequency modulation control can be met, and the primary frequency modulation control is carried out by combining the flywheel energy storage and the unit.
State of charge, soc, (state of charge), also called the remaining capacity, represents the ratio of the remaining dischargeable capacity to the capacity in its fully charged state after the energy storage device has been in use for a period of time or left unused for a long period of time, expressed as a percentage. The battery is generally represented by one byte, namely a hexadecimal system of two bits (the value range is 0-100), the meaning is that the residual energy is 0% -100%, when the SOC is 0%, the battery is completely discharged, and when the SOC is 100%, the battery is completely charged. For flywheel energy storage control, the energy state of the flywheel also needs to be monitored, and the control is carried out by combining the frequency change of a power grid and the SOC state. For the fm control system as a whole, the ideal situation is that the SOC of the energy storage device is 50%, i.e. the energy storage device is in an intermediate position where it can both up-regulate the absorbed energy and down-compensate the energy, but this results in an increase in the size of the energy storage investment. For a receiving-end power grid, the large frequency disturbance is generally power grid frequency dip disturbance caused by external power supply dip, that is, at this time, it is necessary for a power supply in the receiving-end power grid to perform fast frequency modulation compensation, that is, an energy storage device is required to perform energy compensation. Meanwhile, the daily small-frequency disturbance unit of the receiving-end power grid can meet the standard requirement of the power grid, namely the flywheel energy storage device can be in a full capacity SOC (state of 100%). In addition, after the power grid has large frequency disturbance and the flywheel energy storage device releases energy, how to economically and effectively recover to the full capacity state is a practical problem needing to be researched and realized.
Disclosure of Invention
The invention aims to provide a receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation, which can realize linkage between an energy storage device and a unit through the complementation of large and small disturbances and effectively meet the requirement of power grid frequency modulation, so as to solve at least one technical problem in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
on one hand, the invention provides a receiving-end power grid flywheel energy storage frequency modulation method based on frequency disturbance complementation, which comprises the following steps:
judging flyRemaining capacity SOC of wheel energy storage deviceFESWhen the rated capacity H is less than 100 percent, the rated capacity H of the flywheel energy storage device is combinedFES-NCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C；
According to the frequency fluctuation of a receiving-end power grid, the real-time computer unit needs to change the integral electric quantity HPFC；
According to the frequency disturbance condition of the receiving-end power grid and the required charging capacity HFES-CAnd the integral electric quantity H needs to be changedPFCAnd performing flywheel energy storage frequency modulation control.
Preferably, the first and second liquid crystal materials are,
when the frequency of the receiving-end power grid is not less than a first threshold value, the unit needs to reduce the integral electric quantity HPFC；
When the frequency of the receiving-end power grid is not greater than the second threshold value, the unit needs to increase the integral electric quantity HPFC；
Wherein the first threshold is greater than the second threshold;
Preferably, the first and second liquid crystal materials are,
when the receiving end power grid frequency fluctuates above a first threshold value, H of the flywheel energy storage device is judgedFES-CIntegral electric quantity H required to be reduced with unitPFCThe size of (d);
if H isFES-C≥HPFCAnd keeping the load of the unit unchanged, and reducing the integral electric quantity H required by the unitPFCCharging to a flywheel energy storage device;
if H isFES-C<HPFCThe primary frequency modulation is completed by the unit and the flywheel energy storage device together, and the flywheel energy storage device is charged HFES-CThe unit lowers HPFC-HFES-CThe integrated electric quantity of (2).
Preferably, when the frequency of the receiving-end power grid fluctuates and is lower than a second threshold value, frequency modulation control of the unit and the flywheel energy storage device is performed according to the disturbance type.
Preferably, the first and second liquid crystal materials are,
when the disturbance is small, the unit completes the increase of the integral electric quantity of the primary frequency modulation;
when there is a large disturbance, if (H)FES-N-HFES-C)≥HPFCKeeping the load of the unit unchanged, and increasing the integral electric quantity H required by the unitPFCCompensated by a flywheel energy storage device; if (H)FES-N-HFES-C)<HPFCThe primary frequency modulation is completed by the unit and the flywheel energy storage device together, and the flywheel energy storage device discharges HFED-N-HFES-CIncrease of the unit HPFC-(HFES-N-HFES-C) The integrated electric quantity of (2).
Preferably, the calculated required charging capacity is:
HFES-C＝(100％-SOCFES)×HFES-N。
preferably, the first threshold is 50.033Hz, and the second threshold is 49.967 Hz.
In a second aspect, the present invention further provides a receiving-end power grid flywheel energy storage frequency modulation system based on frequency disturbance complementation, where the system includes:
a first calculation module for calculating the residual charge SOC of the flywheel energy storage deviceFESWhen the rated capacity H is less than 100 percent, the rated capacity H of the flywheel energy storage device is combinedFES-NCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C；
A second calculation module for calculating the change of the integral electric quantity H of the unit in real time according to the frequency fluctuation of the receiving-end power gridPFC；
The frequency modulation control module is used for charging the capacity H according to the requirement according to the frequency disturbance condition of the receiving end power gridFES-CAnd the integral electric quantity H needs to be changedPFCAnd performing flywheel energy storage frequency modulation control.
Preferably, the first and second liquid crystal materials are,
the first calculation module comprises a first judgment unit and a charging capacity calculation unit;
the first judging unit is used for judging the residual electric quantity SOC of the flywheel energy storage deviceFESWhether the residual electric quantity is less than 100 percent or not is judged when the residual electric quantity SOC of the flywheel energy storage device is judgedFESWhen the residual electric quantity is less than 100 percent, the residual electric quantity SOC of the flywheel energy storage device is measuredFESSending the data to a charging capacity calculation unit;
the calculation unit of the capacity to be charged is used for combining the rated capacity H of the flywheel energy storage deviceFES-NAnd remaining capacity SOCFESCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C。
Preferably, the first and second liquid crystal materials are,
the second calculation module comprises a second judgment unit, and the second judgment unit is used for judging the frequency fluctuation range of the receiving-end power grid;
when the frequency of the receiving-end power grid is not less than a first threshold value, the unit needs to reduce the integral electric quantity HPFC(ii) a When the frequency of the receiving-end power grid is not greater than the second threshold value, the unit needs to increase the integral electric quantity HPFC。
Preferably, the first and second liquid crystal materials are,
the frequency modulation control module comprises a third judgment unit and a control unit;
the third judging unit is used for judging H of the flywheel energy storage device when the receiving end power grid frequency fluctuates and is higher than the first threshold valueFES-CIntegral electric quantity H required to be reduced with unitPFCThe size of (d);
the control unit is used for controlling the current HFES-C≥HPFCIn time, the integral electric quantity H required to be reduced by the unit is controlledPFCCharging to a flywheel energy storage device; when H is presentFES-C<HPFCIn time, the flywheel energy storage device is controlled to charge HFES-CThe unit lowers HPFC-HFES-CThe integrated electric quantity of (2).
Preferably, the first and second liquid crystal materials are,
the frequency modulation control module further comprises a fourth judging unit, and the fourth judging unit is used for judging the frequency disturbance type of the receiving-end power grid when the frequency of the receiving-end power grid fluctuates and is lower than a second threshold value.
Preferably, the first and second liquid crystal materials are,
and the control unit is also used for controlling the unit to increase the integral electric quantity of the primary frequency modulation when the frequency disturbance type of the receiving-end power grid is small disturbance.
Preferably, the first and second liquid crystal materials are,
the frequency modulation control module further comprises a fifth judging unit, and the fifth judging unit is used for judging the difference between the rated capacity and the capacity to be charged and the size of the integral electric quantity to be changed when the frequency disturbance type of the receiving-end power grid is small disturbance.
Preferably, the first and second liquid crystal materials are,
the control unit is also used when (H)FES-N-HFES-C)≥HPFCIn time, the integral electric quantity H which needs to be increased by the compensating unit of the flywheel energy storage device is controlledPFC(ii) a When (H)FES-N-HFES-C)<HPFCIn time, the flywheel energy storage device is controlled to discharge HFED-N-HFES-CIncrease of the unit HPFC-(HFES-N-HFES-C) The integrated electric quantity of (2).
In a third aspect, the present invention also provides a computer device comprising a memory and a processor, the processor and the memory being in communication with each other, the memory storing program instructions executable by the processor, the processor calling the program instructions to perform the method as described above.
In a fourth aspect, the present invention also provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the method as described above.
The invention has the beneficial effects that: according to the difference of power grid frequency disturbance, different frequency modulation control modes are adopted for the flywheel energy storage device and the unit, so that the action times of the unit at high frequency are reduced, the service life of equipment such as a unit valve is prolonged, quick primary frequency modulation can be realized through the flywheel energy storage device, the economic operation of the flywheel energy storage and unit comprehensive frequency modulation system is ensured, and the stable operation of the flywheel energy storage and unit comprehensive frequency modulation system is realized.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a receiving-end power grid flywheel energy storage frequency modulation system based on frequency disturbance complementation according to embodiment 1 of the present invention.
Fig. 2 is a flowchart of a receiving-end power grid flywheel energy storage frequency modulation method based on frequency disturbance complementation according to embodiment 2 of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by way of the drawings are illustrative only and are not to be construed as limiting the invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
For the purpose of facilitating an understanding of the present invention, the present invention will be further explained by way of specific embodiments with reference to the accompanying drawings, which are not intended to limit the present invention.
It should be understood by those skilled in the art that the drawings are merely schematic representations of embodiments and that the elements shown in the drawings are not necessarily required to practice the invention.
Example 1
As shown in fig. 1, embodiment 1 of the present invention provides a receiving-end power grid flywheel energy storage frequency modulation system based on frequency disturbance complementation, where the system includes:
a first calculation module for calculating the residual charge SOC of the flywheel energy storage deviceFESWhen the rated capacity H is less than 100 percent, the rated capacity H of the flywheel energy storage device is combinedFES-NCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C。
A second calculation module for calculating the change of the integral electric quantity H of the unit in real time according to the frequency fluctuation of the receiving-end power gridPFC。
The frequency modulation control module is used for charging the capacity H according to the requirement according to the frequency disturbance condition of the receiving end power gridFES-CAnd the integral electric quantity H needs to be changedPFCAnd performing flywheel energy storage frequency modulation control.
In this embodiment 1, the first calculating module includes a first judging unit and a charging capacity calculating unit.
The first judging unit is used for judging the residual electric quantity SOC of the flywheel energy storage deviceFESWhether the residual electric quantity is less than 100 percent or not is judged when the residual electric quantity SOC of the flywheel energy storage device is judgedFESWhen the residual electric quantity is less than 100%, the residual electric quantity SOC of the flywheel energy storage deviceFESAnd sending the data to a charging capacity calculation unit.
The calculation unit of the capacity to be charged is used for combining the rated capacity H of the flywheel energy storage deviceFES-NAnd remaining capacity SOCFESCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C。
In this embodiment 1, the second calculating module includes a second determining unit, and the second determining unit is configured to determine a frequency fluctuation range of the receiving-end power grid;
when the frequency of the receiving-end power grid is not less than a first threshold value, the unit needs to reduce the integral electric quantity HPFC(ii) a When the frequency of the receiving-end power grid is not greater than the second threshold value, the unit needs to increase the integral electric quantity HPFC。
In this embodiment 1, the fm control module includes a third determining unit and a control unit.
The third judging unit is used for judging H of the flywheel energy storage device when the receiving end power grid frequency fluctuates and is higher than the first threshold valueFES-CIntegral electric quantity H required to be reduced with unitPFCThe size of (2).
The control unit is used for controlling the current HFES-C≥HPFCIn time, the integral electric quantity H required to be reduced by the unit is controlledPFCCharging to a flywheel energy storage device; when H is presentFES-C<HPFCControlling the flywheel energy storage device to charge HFES-CThe unit lowers HPFC-HFES-CThe integrated electric quantity of (2).
In this embodiment 1, the frequency modulation control module further includes a fourth determining unit, configured to determine a type of disturbance of the receiving-end grid frequency when the receiving-end grid frequency fluctuates below a second threshold.
In this embodiment 1, when the fourth determining unit determines that the frequency disturbance of the receiving-end power grid is small disturbance, the control unit controls the unit to perform the primary frequency modulation productAnd increasing the power distribution amount. When the fourth judging unit judges that the frequency disturbance of the receiving-end power grid is large disturbance, the fifth judging unit judges (H)FES-N-HFES-C) And HPFCSize of (A), (B), (C), (D), (FES-N-HFES-C)≥HPFCAnd the control unit controls the integral electric quantity H which needs to be increased by the flywheel energy storage device compensation unitPFC(ii) a If (H)FES-N-HFES-C)<HPFCThe control unit controls the flywheel energy storage device to discharge HFED-N-HFES-CIncrease of the unit HPFC-(HFES-N-HFES-C) The integrated electric quantity of (2).
In this embodiment 1, the process of the control method for frequency modulation by using the above system is as follows:
the first judging unit judges the residual electric quantity SOC of the flywheel energy storage deviceFESWhen the charging capacity is less than 100%, the calculation unit of the charging capacity is combined with the rated capacity H of the flywheel energy storage deviceFES-NCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C. The required charging capacity is: hFES-C＝(100％-SOCFES)×HFES-N。
When the second judgment unit judges that the frequency of the frequency fluctuation receiving-end power grid of the receiving-end power grid is not less than the first threshold value, the unit needs to reduce the integral electric quantity HPFC(ii) a When the second judgment unit judges that the frequency of the receiving-end power grid is not greater than the second threshold value, the unit needs to increase the integral electric quantity HPFC。
t0Indicating the moment at which the frequency exceeds the dead band of the primary frequency-modulation action, ttIndicating the end of primary frequency modulation calculation, P0For the time when the unit frequency exceeds the dead zone, the unit load value, PtThe actual active power output of the unit at the moment t. Wherein the first threshold is greater than the second threshold.
According to the frequency disturbance condition of the receiving-end power grid and the required charging capacity HFES-CAnd the integral electric quantity H needs to be changedPFCAnd performing flywheel energy storage frequency modulation control.
When the receiving end power grid frequency fluctuates and is not lower than the first threshold value, the third judgment unitJudging H of flywheel energy storage deviceFES-CIntegral electric quantity H required to be reduced with unitPFCThe size of (2). If H isFES-C≥HPFCAnd the load of the unit is kept unchanged, and the control unit controls the integral electric quantity H required to be reduced by the unitPFCCharging to a flywheel energy storage device; if H isFES-C<HPFCThe unit and the flywheel energy storage device jointly complete the primary frequency modulation, and the control unit controls the flywheel energy storage device to charge HFES-CThe unit lowers HPFC-HFES-CThe integrated electric quantity of (2).
And when the receiving-end power grid frequency fluctuates below a second threshold value, the fourth judging unit judges the type of the receiving-end power grid frequency disturbance. And when the fourth judging unit judges that the frequency disturbance of the receiving-end power grid is small disturbance, the control unit controls the unit to increase the integral electric quantity of the primary frequency modulation. When the fourth judging unit judges that the frequency disturbance of the receiving-end power grid is large disturbance, the fifth judging unit judges (H)FES-N-HFES-C) And HPFCSize of (A), (B), (C), (D), (FES-N-HFES-C)≥HPFCAnd the control unit controls the integral electric quantity H which needs to be increased by the flywheel energy storage device compensation unitPFC(ii) a If (H)FES-N-HFES-C)<HPFCThe control unit controls the flywheel energy storage device to discharge HFED-N-HFES-CIncrease of the unit HPFC-(HFES-N-HFES-C) The integrated electric quantity of (2).
Example 2
As shown in fig. 2, embodiment 2 of the present invention provides a receiving-end power grid flywheel energy storage frequency modulation control method based on frequency disturbance complementation, in which power grid frequency disturbance and energy management of a flywheel energy storage device are combined, energy distribution is reasonably allocated, and safe, economic and stable operation of a flywheel energy storage and unit integrated frequency modulation system is ensured.
As can be seen from fig. 1, the method in this embodiment 2 includes the following processes:
s1: monitoring SOC of flywheel energy storage device through first judging unitFESWhether or not less than 100%.
S2: when the first judging unit monitors the SOC of the flywheel energy storage deviceFESWhen the charging capacity is less than 100%, the calculation unit of the charging capacity is used for calculating the rated capacity H of the flywheel energy storage deviceFES-NAnd SOCFESCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C。
S3: the second judgment unit monitors the power grid frequency fluctuation and calculates the integral electric quantity H required to be reduced by the unit frequency disturbance in real timePFC-DOr the integral electric quantity H to be increasedPFC-I。
S4: according to different power grid frequency disturbances, combining HFES-C、HPFC-I、HPFC-DAnd performing flywheel energy storage and unit comprehensive frequency modulation control.
In step S2, the flywheel energy storage device requires a charging capacity: hFES-C＝(100％-SOCFES)×HFES-N。
The primary frequency modulation load compensation value of the thermal power generating unit needs to meet the requirements of related technical standards such as GB/T30370 guide rules for primary frequency modulation test and performance acceptance of the thermal power generating unit, Q/GDW 669 guide rules for primary frequency modulation test of the thermal power generating unit and the like, and the unit participates in the primary frequency modulation dead zone fDShould be within + -0.033 Hz, so that in step S3, when the grid frequency f judged by the second judging unit is greater than or equal to 50.033Hz, the unit needs to be lowered
Integrating the electric quantity; grid frequency f judged by the second judging unit<49.967Hz, the number of units is increased
The electric quantity is integrated. Wherein, t0At a time when the frequency exceeds the dead zone of the primary frequency modulation action, ttCalculating the end time, P, for a primary modulation0For the time when the unit frequency exceeds the dead zone, the unit load value, PtThe actual active power output of the unit at the moment t.
In step S4, when the grid frequency is disturbed by not less than 50.033Hz, the third judgment unit judges the H of the flywheel energy storage deviceFES-CWhether it is greater than H of the unitPFC-D: if H isFES-C≥HPFC-DThe control unit controls the unit to maintain the load of the unit unchangedIntegral electric quantity H needing to be reducedPFC-DCharging to a flywheel energy storage device; if H isFES-C<HPFC-DThe unit and the flywheel energy storage device jointly complete the primary frequency modulation, and the control unit controls the flywheel energy storage device to charge HFES-CThe unit lowers HPFC-D-HFES-CThe electric quantity is integrated.
In step S4, when the grid frequency is disturbed by less than 49.967Hz, the fourth determining unit determines the disturbance type. When the disturbance type is small disturbance, the unit completes the increase of the integral electric quantity of the primary frequency modulation; when the disturbance type is large disturbance, the fifth judgment unit judges (H)FES-N-HFES-C) And HPFC-IThe magnitude relationship of (1). If (H)FES-N-HFES-C)≥HPFC-IThe control unit controls the integral electric quantity H to be increased by the unit when the load of the unit is kept unchangedPFC-ICompensated by a flywheel energy storage device; if (H)FES-N-HFES-C)<HPFC-IThe unit and the flywheel energy storage device jointly complete the primary frequency modulation, and the control end element controls the flywheel energy storage device to discharge HFED-N-HFES-CIncrease of the unit HPFC-I-(HFES-N-HFES-C) The electric quantity is integrated.
In this embodiment 2, an application example of the above method in an actual power grid is further described by taking flywheel energy storage and unit joint frequency modulation in a certain power saving network in a certain power grid area as an example.
Effective perturbations are defined as frequencies that exceed the primary frequency modulation dead zone (50 + -0.033 Hz) and last 6 seconds and above, while the maximum frequency deviation reaches 50 + -0.038 Hz. After the effective disturbance condition is met, the frequency exceeds 50.0 +/-0.05 Hz and lasts for 1s or more, the disturbance is defined as large disturbance, and the maximum continuous evaluation time of the large disturbance is 60 s. Effective disturbance which does not reach the large disturbance standard is defined as small disturbance, and the maximum continuous evaluation time of the small disturbance is 30 s.
The 1000MW ultra-supercritical secondary reheating unit of a power plant in a power-saving network has the operating characteristics of high parameter, low energy consumption and more environmental protection. The work of the high-pressure cylinder of the steam turbine of the secondary reheating unit is nearly half lower than that of the high-pressure cylinder of the primary reheating unit, the throttling loss of the steam turbine is reduced to a certain extent by the characteristic, the running efficiency of the steam turbine is improved, and meanwhile, the quick load change capacity of the steam turbine is poor. It can be seen from the primary frequency modulation test data that the load response of the first 15 seconds after the primary frequency modulation action is insufficient, mainly because the work-doing capacity of the secondary reheating unit is greatly reduced compared with that of the conventional unit due to the ultra-high pressure cylinder participating in the adjustment under the same door-adjusting action amplitude, and the load increase of the unit in a short time cannot meet the primary frequency modulation requirement. Therefore, the unit is provided with a flywheel energy storage device to jointly realize the primary frequency modulation function. Considering economy, the rated capacity of the flywheel energy storage device is designed to be 6MW and can last for 60s, the flywheel can be charged at any time when the rotating speed is lower than 100% of the rated rotating speed, the rising time of the output power of the flywheel energy storage device is less than 2ms, and the response delay is less than 5 ms.
Monitoring SOC of flywheel energy storage device at a certain timeFES85% due to the rated capacity PFES-N6MW for 60s, then
HFES-N＝6×60＝360MWs，
HFES-C＝(100％-SOCFES)×HFES-N＝15％×360＝54MWs。
The power grid frequency fluctuates at the next moment, the frequency is 50.042Hz, the duration is 8s, the power grid frequency small disturbance examination condition is met, and the load quantity to be reduced in the unit frequency disturbance is calculated
Due to the fact that if H isFES-C>HPFC-DTherefore, the load of the time group is kept unchanged, and the integral electric quantity H required by the time group to be reduced is reducedPFC-DThe energy storage device of the flywheel is charged, namely the energy storage device of the flywheel absorbs 10.8MWs capacity from the power grid in the plant, and the unit does not need to control and adjust the wind, coal and water in the primary frequency modulation, so that the service life of the unit equipment is shortened, the working efficiency of the unit is improved, and the energy consumption caused by insufficient combustion in short-time transient fluctuation is avoided.
Example 3
An embodiment 3 of the present invention provides a computer device, including a memory and a processor, where the processor and the memory are in communication with each other, the memory stores a program instruction executable by the processor, and the processor invokes the program instruction to execute a receiving-end power grid flywheel energy storage frequency modulation control method based on frequency disturbance complementation, where the method includes:
s1: monitoring SOC of flywheel energy storage deviceFESWhether it is less than 100%;
s2: according to the rated capacity H of the flywheel energy storage deviceFES-NAnd SOCFESCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C；
S3: monitoring power grid frequency fluctuation and calculating integral electric quantity H needing to be reduced by unit frequency disturbance in real timePFC-DOr the integral electric quantity H to be increasedPFC-I；
S4: according to different power grid frequency disturbances, combining HFES-C、HPFC-I、HPFC-DAnd performing flywheel energy storage and unit comprehensive frequency modulation control.
Example 4
An embodiment 4 of the present invention provides a computer-readable storage medium, in which a computer program is stored, where the computer program, when executed by a processor, implements a receiving-end power grid flywheel energy storage frequency modulation control method based on frequency disturbance complementation, where the method includes:
s1: monitoring SOC of flywheel energy storage deviceFESWhether it is less than 100%;
s2: according to the rated capacity H of the flywheel energy storage deviceFES-NAnd SOCFESCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C；
S3: monitoring power grid frequency fluctuation and calculating integral electric quantity H needing to be reduced by unit frequency disturbance in real timePFC-DOr the integral electric quantity H to be increasedPFC-I；
S4: according to different power grid frequency disturbances, combining HFES-C、HPFC-I、HPFC-DAnd performing flywheel energy storage and unit comprehensive frequency modulation control.
In summary, according to the receiving-end power grid flywheel energy storage frequency modulation system and method based on frequency disturbance complementation, the flywheel and the unit are organically combined together through the monitored charging state of the flywheel energy storage device and the change condition of the power grid frequency, and different frequency modulation control modes are adopted according to different frequency disturbances, so that the economic operation of the flywheel energy storage and unit comprehensive frequency modulation system is effectively ensured; the charging quantity required by the flywheel energy storage device is compensated by utilizing the high-frequency small disturbance of the unit, so that the action times of the unit at high frequency are reduced, the service lives of equipment such as a valve of the unit are prolonged, quick primary frequency modulation can be realized through the flywheel energy storage device, and the stable operation of a flywheel energy storage and unit comprehensive frequency modulation system is realized.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the present disclosure has been described with reference to the specific embodiments shown in the drawings, it is not intended to limit the scope of the present disclosure, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive faculty based on the technical solutions disclosed in the present disclosure.
Claims (17)
1. A receiving-end power grid flywheel energy storage frequency modulation method based on frequency disturbance complementation is characterized in that:
judging residual electric quantity SOC of flywheel energy storage deviceFESWhen the rated capacity H is less than 100 percent, the rated capacity H of the flywheel energy storage device is combinedFES-NCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C；
According to the frequency fluctuation of a receiving-end power grid, the real-time computer unit needs to change the integral electric quantity HPFC；
According to the frequency disturbance condition of a receiving end power grid, the required charging capacity H is combinedFES-CAnd the integral electric quantity H needs to be changedPFCAnd performing flywheel energy storage frequency modulation control.
2. The receiving-end power grid flywheel energy storage frequency modulation method based on frequency disturbance complementation according to claim 1, characterized in that:
when the frequency of the receiving-end power grid is not less than a first threshold value, the unit needs to reduce the integral electric quantity HPFC；
When the frequency of the receiving-end power grid is not greater than the second threshold value, the unit needs to increase the integral electric quantity HPFC；
Wherein the first threshold is greater than the second threshold;
3. The receiving-end power grid flywheel energy storage frequency modulation method based on frequency disturbance complementation according to claim 2, characterized in that:
when the receiving end power grid frequency fluctuates above a first threshold value, H of the flywheel energy storage device is judgedFES-CIntegral electric quantity H required to be reduced with unitPFCThe size of (d);
if H isFES-C≥HPFCAnd keeping the load of the unit unchanged, and reducing the integral electric quantity H required by the unitPFCCharging to a flywheel energy storage device;
if H isFES-C<HPFCThe primary frequency modulation is completed by the unit and the flywheel energy storage device together, and the flywheel energy storage device is charged HFES-CThe unit lowers HPFC-HFES-CThe integrated electric quantity of (2).
4. The receiving-end power grid flywheel energy storage frequency modulation method based on frequency disturbance complementation according to claim 2, characterized in that:
and when the frequency of the receiving-end power grid fluctuates and is lower than a second threshold value, carrying out frequency modulation control on the unit and the flywheel energy storage device according to the disturbance type.
5. The receiving-end power grid flywheel energy storage frequency modulation method based on frequency disturbance complementation according to claim 4, wherein the method comprises the following steps:
when the disturbance is small, the unit completes the increase of the integral electric quantity of the primary frequency modulation;
when there is a large disturbance, if (H)FES-N-HFES-C)≥HPFCKeeping the load of the unit unchanged, and increasing the integral electric quantity H required by the unitPFCCompensated by a flywheel energy storage device; if (H)FES-N-HFES-C)<HPFCThe primary frequency modulation is completed by the unit and the flywheel energy storage device together, and the flywheel energy storage device discharges HFED-N-HFES-CIncrease of the unit HPFC-(HFES-N-HFES-C) The integrated electric quantity of (2).
6. The receiving-end power grid flywheel energy storage frequency modulation method based on frequency disturbance complementation according to any one of claims 1-5, wherein the calculation of the required charging capacity is as follows:
HFES-C＝(100％-SOCFES)×HFES-N。
7. the receiving-end power grid flywheel energy storage frequency modulation method based on frequency disturbance complementation according to any one of claims 2-5, wherein:
the first threshold is 50.033Hz, and the second threshold is 49.967 Hz.
8. A receiving end power grid flywheel energy storage frequency modulation system based on frequency disturbance complementation is characterized by comprising:
a first calculation module for calculating the residual charge SOC of the flywheel energy storage deviceFESWhen the rated capacity H is less than 100 percent, the rated capacity H of the flywheel energy storage device is combinedFES-NCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C；
Second calculation modelA block for calculating the integral electric quantity H of the unit to be changed according to the frequency fluctuation of the receiving-end power gridPFC；
The frequency modulation control module is used for charging the capacity H according to the requirement according to the frequency disturbance condition of the receiving end power gridFES-CAnd the integral electric quantity H needs to be changedPFCAnd performing flywheel energy storage frequency modulation control.
9. The receiving-end power grid flywheel energy storage frequency modulation system based on frequency disturbance complementation according to claim 8, wherein:
the first calculation module comprises a first judgment unit and a charging capacity calculation unit;
the first judging unit is used for judging the residual electric quantity SOC of the flywheel energy storage deviceFESWhether the residual electric quantity is less than 100 percent or not is judged when the residual electric quantity SOC of the flywheel energy storage device is judgedFESWhen the residual electric quantity is less than 100 percent, the residual electric quantity SOC of the flywheel energy storage device is measuredFESSending the data to a charging capacity calculation unit;
the calculation unit of the capacity to be charged is used for combining the rated capacity H of the flywheel energy storage deviceFES-NAnd remaining capacity SOCFESCalculating the charging capacity H of the flywheel energy storage device in real timeFES-C。
10. The receiving-end power grid flywheel energy storage frequency modulation system based on frequency disturbance complementation according to claim 8, wherein:
the second calculation module comprises a second judgment unit, and the second judgment unit is used for judging the frequency fluctuation range of the receiving-end power grid;
when the frequency of the receiving-end power grid is not less than a first threshold value, the unit needs to reduce the integral electric quantity HPFC(ii) a When the frequency of the receiving-end power grid is not greater than the second threshold value, the unit needs to increase the integral electric quantity HPFC。
11. The receiving-end power grid flywheel energy storage frequency modulation system based on frequency disturbance complementation according to claim 10, wherein:
the frequency modulation control module comprises a third judgment unit and a control unit;
the third judging unit is used for judging H of the flywheel energy storage device when the receiving end power grid frequency fluctuates and is higher than the first threshold valueFES-CIntegral electric quantity H required to be reduced with unitPFCThe size of (d);
the control unit is used for controlling the current HFES-C≥HPFCIn time, the integral electric quantity H required to be reduced by the unit is controlledPFCCharging to a flywheel energy storage device; when H is presentFES-C<HPFCIn time, the flywheel energy storage device is controlled to charge HFES-CThe unit lowers HPFC-HFES-CThe integrated electric quantity of (2).
12. The receiving-end power grid flywheel energy storage frequency modulation system based on frequency disturbance complementation according to claim 11, wherein:
the frequency modulation control module further comprises a fourth judging unit, and the fourth judging unit is used for judging the frequency disturbance type of the receiving-end power grid when the frequency of the receiving-end power grid fluctuates and is lower than a second threshold value.
13. The receiving-end power grid flywheel energy storage frequency modulation system based on frequency disturbance complementation according to claim 12, wherein:
and the control unit is also used for controlling the unit to increase the integral electric quantity of the primary frequency modulation when the frequency disturbance type of the receiving-end power grid is small disturbance.
14. The receiving-end power grid flywheel energy storage frequency modulation system based on frequency disturbance complementation according to claim 13, wherein:
the frequency modulation control module further comprises a fifth judging unit, and the fifth judging unit is used for judging the difference between the rated capacity and the capacity to be charged and the size of the integral electric quantity to be changed when the frequency disturbance type of the receiving-end power grid is small disturbance.
15. The receiving-end power grid flywheel energy storage frequency modulation system based on frequency disturbance complementation according to claim 14, wherein:
the control unit also usesWhen (H)FES-N-HFES-C)≥HPFCIn time, the integral electric quantity H which needs to be increased by the compensating unit of the flywheel energy storage device is controlledPFC(ii) a When (H)FES-N-HFES-C)<HPFCIn time, the flywheel energy storage device is controlled to discharge HFED-N-HFES-CIncrease of the unit HPFC-(HFES-N-HFES-C) The integrated electric quantity of (2).
16. A computer device comprising a memory and a processor, the processor and the memory in communication with each other, the memory storing program instructions executable by the processor, characterized in that: the processor calls the program instructions to perform the method of any one of claims 1-7.
17. A computer-readable storage medium storing a computer program, characterized in that: the computer program, when executed by a processor, implements the method of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010911479.XA CN112018785B (en) | 2020-09-02 | 2020-09-02 | Receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010911479.XA CN112018785B (en) | 2020-09-02 | 2020-09-02 | Receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112018785A true CN112018785A (en) | 2020-12-01 |
| CN112018785B CN112018785B (en) | 2021-11-09 |
Family
ID=73516699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010911479.XA Active CN112018785B (en) | 2020-09-02 | 2020-09-02 | Receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112018785B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112541696A (en) * | 2020-12-21 | 2021-03-23 | 国网北京市电力公司 | Assessment system and remote assessment method based on assessment system |
| CN112600229A (en) * | 2021-03-08 | 2021-04-02 | 沈阳微控新能源技术有限公司 | Magnetic suspension flywheel energy storage array system for island power grid and control method thereof |
| CN113659597A (en) * | 2021-09-06 | 2021-11-16 | 华北电力科学研究院有限责任公司 | Flywheel energy storage control method and device |
| CN113725881A (en) * | 2021-08-26 | 2021-11-30 | 深圳市今朝时代股份有限公司 | Super-capacitor energy storage device for auxiliary frequency modulation and control method |
| CN113922391A (en) * | 2021-10-19 | 2022-01-11 | 吉林省电力科学研究院有限公司 | Control method for primary frequency modulation of flywheel energy storage auxiliary thermal power generating unit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140145452A1 (en) * | 2012-04-20 | 2014-05-29 | North China Electric Power Research Institute Co. Ltd. | Method and device for primary frequency regulation based on bang-bang control |
| CN109636247A (en) * | 2019-01-14 | 2019-04-16 | 国电南瑞科技股份有限公司 | A kind of fired power generating unit primary frequency modulation performance performance assessment criteria calculation method and its system |
| CN109638879A (en) * | 2018-12-14 | 2019-04-16 | 国网山东省电力公司电力科学研究院 | Primary frequency modulation dynamic compensation adjustment system and method based on performance indicator assessment |
| CN110112724A (en) * | 2019-04-19 | 2019-08-09 | 微控物理储能研究开发（深圳）有限公司 | Flywheel energy storage device and generating set joint power supply system and control method |
| CN110571833A (en) * | 2019-09-20 | 2019-12-13 | 国网山东省电力公司电力科学研究院 | Flywheel energy storage-based thermal power generating unit primary frequency modulation control method and device |
| CN110601236A (en) * | 2019-09-20 | 2019-12-20 | 国网山东省电力公司电力科学研究院 | Capacity selection method and device of flywheel energy storage compensation device |
| CN111030195A (en) * | 2019-12-31 | 2020-04-17 | 深圳市科陆电子科技股份有限公司 | Control method and device for energy storage system to participate in power grid power frequency modulation and storage device |
-
2020
- 2020-09-02 CN CN202010911479.XA patent/CN112018785B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140145452A1 (en) * | 2012-04-20 | 2014-05-29 | North China Electric Power Research Institute Co. Ltd. | Method and device for primary frequency regulation based on bang-bang control |
| CN109638879A (en) * | 2018-12-14 | 2019-04-16 | 国网山东省电力公司电力科学研究院 | Primary frequency modulation dynamic compensation adjustment system and method based on performance indicator assessment |
| CN109636247A (en) * | 2019-01-14 | 2019-04-16 | 国电南瑞科技股份有限公司 | A kind of fired power generating unit primary frequency modulation performance performance assessment criteria calculation method and its system |
| CN110112724A (en) * | 2019-04-19 | 2019-08-09 | 微控物理储能研究开发（深圳）有限公司 | Flywheel energy storage device and generating set joint power supply system and control method |
| CN110571833A (en) * | 2019-09-20 | 2019-12-13 | 国网山东省电力公司电力科学研究院 | Flywheel energy storage-based thermal power generating unit primary frequency modulation control method and device |
| CN110601236A (en) * | 2019-09-20 | 2019-12-20 | 国网山东省电力公司电力科学研究院 | Capacity selection method and device of flywheel energy storage compensation device |
| CN111030195A (en) * | 2019-12-31 | 2020-04-17 | 深圳市科陆电子科技股份有限公司 | Control method and device for energy storage system to participate in power grid power frequency modulation and storage device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112541696A (en) * | 2020-12-21 | 2021-03-23 | 国网北京市电力公司 | Assessment system and remote assessment method based on assessment system |
| CN112600229A (en) * | 2021-03-08 | 2021-04-02 | 沈阳微控新能源技术有限公司 | Magnetic suspension flywheel energy storage array system for island power grid and control method thereof |
| CN112600229B (en) * | 2021-03-08 | 2021-06-22 | 沈阳微控新能源技术有限公司 | Magnetic suspension flywheel energy storage array system for island power grid and control method thereof |
| CN113725881A (en) * | 2021-08-26 | 2021-11-30 | 深圳市今朝时代股份有限公司 | Super-capacitor energy storage device for auxiliary frequency modulation and control method |
| CN113725881B (en) * | 2021-08-26 | 2022-07-29 | 深圳市今朝时代股份有限公司 | Super-capacitor energy storage device for auxiliary frequency modulation and control method |
| CN113659597A (en) * | 2021-09-06 | 2021-11-16 | 华北电力科学研究院有限责任公司 | Flywheel energy storage control method and device |
| CN113659597B (en) * | 2021-09-06 | 2024-01-23 | 华北电力科学研究院有限责任公司 | Flywheel energy storage control method and device |
| CN113922391A (en) * | 2021-10-19 | 2022-01-11 | 吉林省电力科学研究院有限公司 | Control method for primary frequency modulation of flywheel energy storage auxiliary thermal power generating unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112018785B (en) | 2021-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112018785B (en) | Receiving-end power grid flywheel energy storage frequency modulation method and system based on frequency disturbance complementation | |
| CN107508303B (en) | Micro-grid-oriented modular energy storage device optimal configuration and control method | |
| CN103457281B (en) | A kind of super capacitor energy-storage system participates in the control method for coordinating of electric power primary frequency modulation | |
| CN109888796A (en) | A kind of battery energy storage power station control method and system for primary frequency regulation of power network | |
| CN111614108B (en) | Fire-storage AGC frequency modulation control method considering flexible load characteristics | |
| CN112491064A (en) | Energy storage primary frequency modulation comprehensive control method considering SOC adaptive recovery | |
| Meng et al. | Energy storage auxiliary frequency modulation control strategy considering ACE and SOC of energy storage | |
| CN103178533A (en) | Controlling method and controller for variable participation frequency of temperature control load | |
| CN104410094A (en) | Active power distribution method of battery energy storage power station | |
| CN112787340A (en) | Control method for combined frequency modulation of thermal power and energy storage system | |
| CN201766373U (en) | Power quality control device for distributed photovoltaic power grid | |
| CN110571833B (en) | Primary frequency modulation control device of thermal power generating unit based on flywheel energy storage | |
| CN103560533B (en) | The method and system of the level and smooth wind light generation fluctuation of energy-accumulating power station are controlled based on rate of change | |
| CN104978609B (en) | A kind of energy-optimised management method of micro-capacitance sensor | |
| Li et al. | Comprehensive frequency regulation control strategy of thermal power generating unit and ESS considering flexible load simultaneously participating in AGC | |
| CN109936151B (en) | Control method for participating in primary frequency modulation of thermal power generating unit through micro-grid system | |
| CN108462166B (en) | Microgrid spare capacity calculation method and microgrid regulation and control method | |
| Li et al. | Research on the control strategy of energy storage participation in power system frequency regulation | |
| He et al. | Research on the frequency regulation strategy of large-scale Battery energy storage in the power grid system | |
| Chang et al. | A dual-layer cooperative control strategy of battery energy storage units for smoothing wind power fluctuations | |
| CN114825382B (en) | Coordination control method of primary frequency modulation energy storage system of nickel-hydrogen battery auxiliary thermal power generating unit | |
| CN114825393B (en) | Hybrid energy and hydrogen storage device for new energy station | |
| Zhao et al. | Transient voltage and transient frequency stability emergency coordinated control strategy for the multi-infeed HVDC power grid | |
| CN111244994A (en) | Active-reactive cooperative control method for energy storage power station | |
| CN109842149A (en) | Have both off-network, the wind generator system of grid-connected both of which and its working method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |